| Summary: | 碩士 === 國立雲林科技大學 === 環境與安全工程系碩士班 === 95 === Micrometeorology has been widely used upon the measurement of agricultural meteorology and forest biological emission flux. In the past, researches using micrometeorlogy measurement on industry emission are seldom found. The purpose of this research is to try using Multi Pumps Relaxed Eddy Accumulation (MPREA) Method, one of many ways in Micrometeorlogy, in the petrochemical industry to carry out the flux measurement and discuss the empirical coefficient b value and flux result. A field study had been held to measure the fluxes of non-methane hydrocarbon (NMHC) components above a petrochemical industry park.
The research had been conducted over a time period from November 2006 to July 2007. Data for the research had been collected from two locations: one from a flat lawn inside National YunLin University Science and Technology (NYUST), a test site measuring flux 12 meters above ground level; the other took place on a tower in a petrochemical corporation in YunLin County,Taiwan. The flux data had been collected at 78 meters above ground.
From the site of NYUST, data collected indicated that the empirical coefficient bw value is between 0.58~0.63 and bT is between 0.46~0.57; the outcomes are within range of the theory value and suggestion value. In measurement flux test part, momentum flux of experiment and theory value range from 0.185 to 0.751 and 0.191 to 0.744 m2/s respectively. The sensible flux of experiment and theory value range from -0.088 to 0.195 and -0.103 to 0.220 ℃/m-s. (noted that vertical wind speed range from 0.009 to 0.298 m/s with an average value of -0.123 m/s which is an insignificant deviation of vertical wind speed.)
The data collection of the NMHC concentration had been taken from 40 different locations in the petrochemical industry park. The average NMHC concentration in the petrochemical area is 1.2 to 2.4ppm with specially high concentration of NMHC reaching 6 to 7ppm near flair tower and storing tank area.
The measure result of industry park site indicated, average value between 0.22 to 2.05 m/s of vertical wind speed, total average about 0.686 m/s. the momentum flux of experiment result range from 0.039 to 0.811 m2/s. The variation range is between 2% to 40% of the theory and experiment value. The sensible flux range from -6.04 to 0.293 ℃/m-s. In the NNMHC flux aspect, the NMHC flux of downward range from 10 to 4310 mg/m2-h, NMHC flux of upward range from 50 to 8440 mg/m2-h.
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